Published online by Cambridge University Press: 31 May 2012
At a locality nine miles southwest of Fresnillo, Zacatecas, Mexico, a number of females of Dasymutilla formicalia Rohwer and males of D. pallida Mickel were observed around our campsite during the second week of August, 1954. However, all of the males and most of the females were active only in the early morning and late afternoon. On August 10th, in a dirt roadway about three-quarters of a mile from camp an unusually large concentration of these mutillids was discovered at about 6 p.m. Since but a single species of Dasymutilla appeared to be involved the following observations on the activities of the males and females were recorded.